CN104880155A - Long-distance reference laser displacement sensor and distance measurement method thereof - Google Patents
Long-distance reference laser displacement sensor and distance measurement method thereof Download PDFInfo
- Publication number
- CN104880155A CN104880155A CN201510304728.8A CN201510304728A CN104880155A CN 104880155 A CN104880155 A CN 104880155A CN 201510304728 A CN201510304728 A CN 201510304728A CN 104880155 A CN104880155 A CN 104880155A
- Authority
- CN
- China
- Prior art keywords
- laser
- laser displacement
- array device
- pixel
- photoelectric array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Measurement Of Optical Distance (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a long-distance reference laser displacement sensor, which comprises a laser emission device and a laser displacement sensor, wherein the laser displacement sensor comprises a photoelectric array device, the photoelectric array device is provided with a laser incident window, an emitting end of the laser emission device is opposite to the laser incident window of the photoelectric array device, the photoelectric array device is provided with an optical dark cavity at one end of the laser incident window, the laser displacement sensor is electrically connected with a processor, and the processor comprises an A/D signal conversion processor. The long-distance reference laser displacement sensor is novel in structure and applicable to long-distance detection, and the detection precision reaches up to 1-2um. The long-distance reference laser displacement sensor is applicable to different detections through adding a cylindrical lens, and the detection range is wide. The long-distance reference laser displacement sensor is suitable for the illumination brightness under different environments through adding a filtering assembly.
Description
Technical field
The present invention relates to a kind of sensor, particularly relate to a kind of remote reference laser displacement transducer and distance-finding method thereof.
Background technology
Laser displacement sensor can the change such as position, displacement of accurate non-cpntact measurement testee, is mainly used in the measurement of the geometric senses such as the displacement of inspected object, thickness, vibration, distance, diameter.According to measuring principle, laser displacement sensor principle is divided into laser triangulation and return laser beam analytic approach.And the principle that existing laser sensor principle is all scioptics or reflection calculates and measure displacement, meanwhile, sensor internal relative complex.
Existing generating laser and measuring unit are generally arranged in a housing, laser is irradiated to testee back reflection, the laser of reflection, by optical lens system imaging on the photoelectric array devices such as CCD or CMOS, then draws the distance between sensor and testee by image processing and analyzing.But this sensor maximum range is no more than 3.0m; Can only distance between survey sensor and measured point, the displacement on other direction then must be mounted on correspondence direction; And optical lens system is complicated and manufacturing accuracy requires high, involve great expense.
In construction work, general mechanical dial gauge, appearance grid or the grating displacement sensor of adopting detects, but the position (0.1 ~ 0.3m) that these benchmark must be nearer in measured point.When the displacement measurement of remote benchmark (reference point and measured point distant) generally adopts the form of datum line beam (frame) pilot measurement.Utilize joist steel, channel-section steel etc. to have the long pole of certain rigidity of structure as datum line beam (frame), 2 or multiple spot are fixed on benchmark far away, provide a stable benchmark by the position that such mode is nearer in measured point.Then be fixed on datum line beam (frame) by using the mode such as Magnetic gauge stand or unit clamp by displacement transducer, chaining pin then withstands on testee and measures.Erection joist steel, channel-section steel etc. seem heavy and time-consuming in testing, can not embody the portable and quick of test completely.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the object of the invention is to propose a kind of remote reference laser displacement transducer and distance-finding method thereof.
Object of the present invention, will be achieved by the following technical programs:
A kind of remote reference laser displacement transducer, comprise a laser transmitter device and laser displacement sensor, described laser displacement sensor comprises photoelectric array device, described photoelectric array device offers laser entrance window, the transmitting terminal of described generating laser is relative with the laser entrance window of described photoelectric array device, described photoelectric array device is provided with an Optical Dark Solitary Pulse chamber in one end of laser entrance window, described laser displacement sensor and processor are electrically connected, and described processor comprises an A/D signal switching processor.
Preferably, one end of the laser entrance window of described photoelectric array device is provided with a filtering assembly, and described filtering assembly and photoelectric array device form Optical Dark Solitary Pulse chamber.
Preferably, described filtering assembly front end is provided with optical slot sheet.
Preferably, described filtering assembly is filter coating or optical filter.
Preferably, described filtering assembly and photoelectric array device are bonding connection.
Preferably, the transmitting terminal of described laser transmitter device is connected with a cylindrical lens.
Preferably, the optical maser wavelength of described laser transmitter device is 500nm-550nm.
Preferably, described photoelectric array device is line array CCD.
Preferably, described filtering assembly is sun filter coating.
Preferably, comprise the steps,
S1, laser transmitter device and laser displacement sensor are placed on reference thing and testee respectively;
The laser that S2, laser transmitter device send, irradiates on the photoelectric array device in laser displacement sensor through filtering assembly;
The level signal exporting respective pixel point is transferred to signal processor and carries out the conversion process of signal and the storage of level signal magnitude of voltage by S3, photoelectric array device;
S4, by formula V
c=U
av-(U
av-U
min) × k fixes limit the reference voltage level of pixel, wherein, and V
cfor the reference voltage level of boundary pixel; U
avfor the average voltage of all pixels; U
minfor the minimum value in all pixel voltage; K is boundary selectivity constant;
S5, according to formula S=n
c× l calculates distance, and wherein, S is the distance that laser irradiates between boundary pixel and the first pixel, n
cfor the serial number of boundary pixel, l is photoelectric array device sensitivity speck spacing; Described laser irradiation boundary pixel is first and is less than boundary pixel reference voltage level V
ccorresponding pixel.
The present invention gives prominence to effect: device structure is novel, and is applicable to the detection of long-range distance, and accuracy of detection is up to 1-2um, and be applicable to different detections by adding cylindrical lens, sensing range is extensive.The interpolation of filtering assembly is suitable for the illumination brightness under varying environment.
Below just accompanying drawing in conjunction with the embodiments, is described in further detail the specific embodiment of the present invention, is easier to understand, grasp to make technical solution of the present invention.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is another test structure schematic diagram of the present invention, has now installed cylindrical mirror additional at laser displacement sensor transmitting terminal.
Fig. 3 is that the present invention is applicable to test three dimensions distance structure schematic diagram.
Embodiment
As shown in Figure 1, present invention is disclosed a kind of remote reference laser displacement transducer, comprise a laser transmitter device and laser displacement sensor, described laser displacement sensor comprises photoelectric array device, described photoelectric array device offers laser entrance window, the transmitting terminal of described generating laser is relative with the laser entrance window of described photoelectric array device, described photoelectric array device is provided with filtering assembly in one end of laser entrance window, described laser displacement sensor and processor are electrically connected, and described processor comprises an A/D signal switching processor.Described photoelectric array device is line array CCD.
One end of the laser entrance window of described photoelectric array device is provided with a filtering assembly, and described filtering assembly and photoelectric array device form Optical Dark Solitary Pulse chamber.The existence in Optical Dark Solitary Pulse chamber not only can make photoelectric array device normally work, and can also extend the serviceable life of photoelectric array device.
Described filtering assembly is filter coating or optical filter, and described filtering assembly and photoelectric array device are bonding connection.Because optical filter or filter coating not only have the effect of isolated most of extraneous veiling glare, the emittance of most of collimated laser beam can also be intercepted, avoid photosensitive unit in photoelectric array device or sensitivity speck by the laser burnout of high density energy.Optical filter or filter coating not only all band can intercept veiling glare, can also, by different plated films, allow the light of specific wavelength enter photoelectric array device, thus improve signal to noise ratio (S/N ratio).In order to reach best filter effect, described filtering assembly is sun filter coating.Its principle is that most of extraneous veiling glare is all filtered, optical filter or define an Optical Dark Solitary Pulse chamber between filter coating and line array CCD due to when using optical filter or filter coating, and the signal of line array CCD exports normal.When not using optical filter or filter coating, all pixels of line array CCD are state of saturation, cannot normally work.
Normally can work under outdoor strong sunlight to adapt to this displacement transducer, the optical maser wavelength of described laser transmitter device is 500nm-550nm.Such as optical filter or filter coating use and can intercept infrared ray, red spectrum and ultraviolet, the plated film of blue color spectrum or material, only allow the green light of 500nm-550nm wavelength penetrate, and select the laser instrument of 500nm-550nm wavelength to launch collimated laser beam simultaneously.
Installation optical slot sheet is optionally carried out in described filtering assembly front end.Optical slot sheet is installed and can completely cuts off most of veiling glare equally, but the optical path direction incident veiling glare vertical with slit sheet can not intercepted completely.Although slit sheet is for intercepting the effect of extraneous veiling glare not as using the satisfactory for result of optical filter or filter coating, it can select to allow the light of specific light path pass through.This set direction, can by the lower result of use of cost improvement laser displacement sensor under outdoor situations as a kind of supplementary means.In addition, when comparatively multisensor works together, when especially multiple collimated laser beam interferes with each other, install optical slot sheet additional and just can select the collimated laser beam of incidence, eliminate mutual interference.
In order to expand the scope of test, as shown in Figure 2, the transmitting terminal of described laser transmitter device 3 is connected with a cylindrical lens 11, generating laser is sent and can launch fan-shaped collimated laser beam 12, like this when needing to test the displacement between multiple object, use same laser transmitter device 3.
Shown in composition graphs 3, if laser transmitter device 3 launches a branch of collimation cross laser bundle 13, only need two laser displacement sensors 5 to intersect 90 ° of installations, then can measure the displacement of two axis; If increase a laser displacement sensor 5 in its side again or increase distance measurement function on laser transmitter device 3, then can measure the three dimensions displacement of testee.
Comprise the steps,
S1, laser transmitter device 3 and laser displacement sensor 5 are placed on reference thing 1 and testee 2 respectively;
A branch of collimated laser beam 4 that S2, laser transmitter device 3 send, through optical filter or filter coating 7, irradiates on sharp photoelectric array device 6; Meanwhile, signal processor 8 calculates according to the different photosensitive unit of brightness on photoelectric array device 6 or sensitivity speck the position that collimated laser beam 4 irradiates;
The level signal exporting respective pixel point is transferred to signal processor and carries out the conversion process of signal and the storage of level signal magnitude of voltage by S3, photoelectric array device;
S4, by formula V
c=U
av-(U
av-U
min) × k fixes limit the reference voltage level of pixel, wherein, and V
cfor the reference voltage level of boundary pixel; U
avfor the average voltage of all pixels; U
minfor the minimum value in all pixel voltage; K is boundary selectivity constant.
S5, according to formula S=n
c× l calculates distance, and wherein, S is the distance that laser irradiates between boundary pixel and the first pixel, n
cfor the serial number of boundary pixel, l is the distance between the pixel of laser irradiation boundary; Laser irradiation boundary pixel is first and is less than boundary pixel reference voltage level V
ccorresponding pixel.
Circular is illustrated as further: establish the brighter photosensitive unit being collimated laser beam 4 irradiation to be the n-th photosensitive unit, n is multiplied by the distance S between distance l i.e. illuminated sensitivity speck between neighboring photosites and the 1st sensitivity speck, signal processor 8 is according to the cycle outputting measurement value S of setting, and shown by display screen 9, or send to the miscellaneous equipment such as computing machine or PLC 10 simultaneously.
If reference thing 1 maintains static, then laser transmitter device 3 and collimated laser beam 4 also can not offset.Now testee 2 produces relative displacement on tested direction, then laser displacement sensor 5 also can produce corresponding displacement on tested direction, and corresponding skew also occurs in the position that collimated laser beam 4 is radiated on photoelectric array device 6 simultaneously.The difference S1-S2 of its twice measured value of calculating like this, just can obtain reference thing 1 and the shift value of testee 2 on tested direction.The measured value recorded during zero setting also by the mode of inner zero setting, can be set to zero by this sensor, then after, the measured value of output or display is exactly directly relative to displacement during zero setting.
Due to pixel wider range that laser irradiating part divides, so need selected suitable method to carry out computational analysis, thus accurate laser is found to irradiate boundary and the pixel corresponding to boundary (hereinafter referred to as boundary pixel).
First determine the reference voltage level (Vc) for judging boundary pixel, then compare the magnitude of voltage of each pixel and Vc respectively, finally fix limit pixel.The pixel that fixes limit has following several method:
1, minimum value method: in the level signal that all effective pixel points export, the pixel that voltage is minimum, is namely irradiated with a laser the strongest pixel as boundary pixel:
Vc=U
minin=Min (Ui) formula
Vc is the reference voltage level judging boundary pixel;
U
minfor the minimum value in all pixel voltage;
Ui is the magnitude of voltage of i-th pixel;
I is the number of effective pixel points.
2, minimum △ value method: from the 2nd effective pixel points, in the level signal of i-th pixel and the i-th-1 pixel, the pixel that voltage difference is minimum, pixel corresponding to the steepest place that namely output level pulse signal envelope declines is as boundary pixel:
△ V
c=Min (U
i-U
i-1) in formula
△ V
cfor the voltage difference of boundary pixel pixel previous with it;
U
iit is the magnitude of voltage of i-th pixel;
U
i-1it is the magnitude of voltage of the i-th-1 pixel;
I is the number of effective pixel points.
3, dynamic thresholding method: first average voltage (U being less than all pixel level signals
av) and minimum value (U
min) between the suitable pixel corresponding to value as boundary pixel, its expression formula is:
Vc＝U
av-(U
av-U
min)×k
V in formula
cfor judging the reference voltage level of boundary pixel;
U
avfor the average voltage of all pixels;
U
minfor the minimum value in all pixel voltage;
K is boundary selectivity constant;
Its concrete value affects by the factor such as signal to noise ratio (S/N ratio) of line array CCD performance, measuring-signal, and the method for general available contrast experiment is determined.
The major parameter of optical filter or filter coating is the transmittance under collimated laser beam wavelength and the transmittance under other spectral range.By the impact of the factor such as light sensitivity and measuring speed of the power of practical service environment, collimated laser beam, distance between measuring point and reference point, photoelectric array device, specifically select the optical filter of which kind of parameter or filter coating can be determined by contrast test.
Proof of algorithm:
Adopt line array CCD as photoelectric array device in experiment, signal processor exports the clock signal needed for line array CCD work, according to the clock signal of signal processor, line array CCD exports the level signal of respective pixel point one by one, signal processor carries out A/D conversion to level signal, and is stored by the level signal magnitude of voltage (Ui) of each pixel and carry out calculating and comparative analysis.The light intensity that the magnitude of voltage of level signal and its corresponding pixel points are irradiated to is inversely proportional to.
Line array CCD used totally 7500 effective pixel points in this experiment, pel spacing 9.325 μm, theoretical useful range 69.9375mm.
Each testing site gathers 50 Calculation results and carries out cross validation as sample.
Sensor distance generating laser about 10m in experimentation and install firm, avoids other error effect experimental result.
In dynamic thresholding, constant k is 0.8.
The present invention still has numerous embodiments, all employing equivalents or equivalent transformation and all technical schemes formed, and all drops within protection scope of the present invention.
Claims (10)
1. a remote reference laser displacement transducer, comprise a laser transmitter device and laser displacement sensor, it is characterized in that: described laser displacement sensor comprises photoelectric array device, described photoelectric array device offers laser entrance window, the transmitting terminal of described generating laser is relative with the laser entrance window of described photoelectric array device, described photoelectric array device is provided with an Optical Dark Solitary Pulse chamber in one end of laser entrance window, described laser displacement sensor and processor are electrically connected, and described processor comprises an A/D signal switching processor.
2. the remote reference laser displacement transducer of one according to claim 1, it is characterized in that: one end of the laser entrance window of described photoelectric array device is provided with a filtering assembly, described filtering assembly and photoelectric array device form Optical Dark Solitary Pulse chamber.
3. the remote reference laser displacement transducer of one according to claim 1, is characterized in that: described filtering assembly front end is provided with optical slot sheet.
4. the remote reference laser displacement transducer of one according to claim 2, is characterized in that: described filtering assembly is filter coating or optical filter.
5. the remote reference laser displacement transducer of one according to claim 4, is characterized in that: described filtering assembly and photoelectric array device are bonding connection.
6. the remote reference laser displacement transducer of one according to claim 1, is characterized in that: the transmitting terminal of described laser transmitter device is connected with a cylindrical lens.
7. the remote reference laser displacement transducer of one according to claim 1, is characterized in that: the optical maser wavelength of described laser transmitter device is 500nm-550nm.
8. the remote reference laser displacement transducer of one according to claim 1, is characterized in that: described photoelectric array device is line array CCD.
9. the remote reference laser displacement transducer of one according to claim 4, is characterized in that: described filtering assembly is sun filter coating.
10. one according to claim 1 remote reference laser displacement transducer distance-finding method, is characterized in that: comprise the steps,
S1, laser transmitter device and laser displacement sensor are placed on reference thing and testee respectively;
The laser that S2, laser transmitter device send, irradiates on the photoelectric array device in laser displacement sensor through filtering assembly;
The level signal of respective pixel point is transferred to signal processor and carries out the conversion process of signal and the storage of level signal magnitude of voltage by S3, photoelectric array device;
S4, by formula V
c=U
av-(U
av-U
min) × k fixes limit the reference voltage level of pixel, wherein, and V
cfor boundary pixel reference voltage level; U
avfor the average voltage of all pixels; U
minfor the minimum value in all pixel voltage; K is boundary selectivity constant;
S5, according to formula S=n
c× l calculates distance, and wherein, S is the distance that laser irradiates between boundary pixel and the first pixel, n
cfor the serial number of boundary pixel, l is photoelectric array device sensitivity speck spacing; Described laser irradiation boundary pixel is first and is less than boundary pixel reference voltage level V
ccorresponding pixel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510304728.8A CN104880155B (en) | 2015-06-05 | 2015-06-05 | Remote reference laser displacement transducer distance-finding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510304728.8A CN104880155B (en) | 2015-06-05 | 2015-06-05 | Remote reference laser displacement transducer distance-finding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104880155A true CN104880155A (en) | 2015-09-02 |
| CN104880155B CN104880155B (en) | 2017-08-22 |
Family
ID=53947745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510304728.8A Active CN104880155B (en) | 2015-06-05 | 2015-06-05 | Remote reference laser displacement transducer distance-finding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104880155B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781037A (en) * | 2019-03-05 | 2019-05-21 | 华南农业大学 | A kind of high-precision laser sensor and laser control system with distance measurement function |
| CN109813234A (en) * | 2019-03-04 | 2019-05-28 | 中国科学技术大学 | A kind of Laser Displacement Sensor based on CCD |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02268206A (en) * | 1989-04-11 | 1990-11-01 | Natl Space Dev Agency Japan<Nasda> | Remote displacement-measuring apparatus |
| CN2468042Y (en) * | 2000-10-16 | 2001-12-26 | 吕康成 | Laser channel peripheral displacement real-time monitoring instrument |
| CN1643338A (en) * | 2002-02-14 | 2005-07-20 | 里索国家实验室 | Optical displacement sensor |
| CN1746613A (en) * | 2005-09-27 | 2006-03-15 | 天津大学 | Measurement of long-distance and wireless transmission displacement |
| CN1923589A (en) * | 2006-09-21 | 2007-03-07 | 北京交通大学 | Device, system and method for automatic monitoring steel rail parameter by using laser |
| CN200973133Y (en) * | 2006-11-27 | 2007-11-07 | 南通大学 | Outer synchronous wire array CCD drive control system |
| CN101113898A (en) * | 2007-07-24 | 2008-01-30 | 济南蓝动激光技术有限公司 | Railway track verssine measuring apparatus |
| CN101410573A (en) * | 2006-02-01 | 2009-04-15 | 天宝导航有限公司 | Position indicating and guidance system and method thereof |
| CN101629807A (en) * | 2009-08-20 | 2010-01-20 | 中国矿业大学(北京) | Position and attitude parameter measurement system of machine body of boring machine and method thereof |
| CN102944188A (en) * | 2012-10-18 | 2013-02-27 | 北京航空航天大学 | Calibration method of spot scanning three-dimensional topography measuring system |
| CN103198751A (en) * | 2013-03-06 | 2013-07-10 | 南京邮电大学 | Line feature map creation method of mobile robot based on laser range finder |
| CN103499819A (en) * | 2013-09-22 | 2014-01-08 | 中国科学院光电技术研究所 | Measuring device and method for target line-of-sight angel offset and distance |
| CN103760567A (en) * | 2014-01-27 | 2014-04-30 | 中国科学院半导体研究所 | Passive imaging system with distance measuring function and distance measuring method thereof |
| CN204788256U (en) * | 2015-06-05 | 2015-11-18 | 苏州市建设工程质量检测中心有限公司 | Remote benchmark laser displacement sensor |
-
2015
- 2015-06-05 CN CN201510304728.8A patent/CN104880155B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2788281B2 (en) * | 1989-04-11 | 1998-08-20 | 宇宙開発事業団 | Remote displacement measuring device |
| JPH02268206A (en) * | 1989-04-11 | 1990-11-01 | Natl Space Dev Agency Japan<Nasda> | Remote displacement-measuring apparatus |
| CN2468042Y (en) * | 2000-10-16 | 2001-12-26 | 吕康成 | Laser channel peripheral displacement real-time monitoring instrument |
| CN1643338A (en) * | 2002-02-14 | 2005-07-20 | 里索国家实验室 | Optical displacement sensor |
| CN1746613A (en) * | 2005-09-27 | 2006-03-15 | 天津大学 | Measurement of long-distance and wireless transmission displacement |
| CN101410573A (en) * | 2006-02-01 | 2009-04-15 | 天宝导航有限公司 | Position indicating and guidance system and method thereof |
| CN1923589A (en) * | 2006-09-21 | 2007-03-07 | 北京交通大学 | Device, system and method for automatic monitoring steel rail parameter by using laser |
| CN200973133Y (en) * | 2006-11-27 | 2007-11-07 | 南通大学 | Outer synchronous wire array CCD drive control system |
| CN101113898A (en) * | 2007-07-24 | 2008-01-30 | 济南蓝动激光技术有限公司 | Railway track verssine measuring apparatus |
| CN101629807A (en) * | 2009-08-20 | 2010-01-20 | 中国矿业大学(北京) | Position and attitude parameter measurement system of machine body of boring machine and method thereof |
| CN102944188A (en) * | 2012-10-18 | 2013-02-27 | 北京航空航天大学 | Calibration method of spot scanning three-dimensional topography measuring system |
| CN103198751A (en) * | 2013-03-06 | 2013-07-10 | 南京邮电大学 | Line feature map creation method of mobile robot based on laser range finder |
| CN103499819A (en) * | 2013-09-22 | 2014-01-08 | 中国科学院光电技术研究所 | Measuring device and method for target line-of-sight angel offset and distance |
| CN103760567A (en) * | 2014-01-27 | 2014-04-30 | 中国科学院半导体研究所 | Passive imaging system with distance measuring function and distance measuring method thereof |
| CN204788256U (en) * | 2015-06-05 | 2015-11-18 | 苏州市建设工程质量检测中心有限公司 | Remote benchmark laser displacement sensor |
Non-Patent Citations (4)
| Title |
|---|
| 刘二林等: "基于线阵CCD的直立智能车路径动态提取算法", 《工业仪表与自动化装置》 * |
| 唐春晓: "远距离激光挠度/位移测量系统", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 徐国盛: "一维线阵CCD边缘检测中阈值电平的确定", 《潍坊学院学报》 * |
| 陈玉萍等: "应用激光和CCD的远程位移检测实验研究", 《光学技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813234A (en) * | 2019-03-04 | 2019-05-28 | 中国科学技术大学 | A kind of Laser Displacement Sensor based on CCD |
| CN109781037A (en) * | 2019-03-05 | 2019-05-21 | 华南农业大学 | A kind of high-precision laser sensor and laser control system with distance measurement function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104880155B (en) | 2017-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2972471B1 (en) | Lidar scanner | |
| CN105424322B (en) | Self calibration plain shaft parallelism detector and detection method | |
| CN105890625B (en) | A kind of veiling glare test method of the star sensor based on carbon nanotube hood | |
| CN102384841B (en) | Spectral responsivity test method for plane array detector | |
| CN103105286B (en) | Imaging electric system spectral response nonuniform measurement method | |
| CN102507148A (en) | Detection system of multi-quadrant photoelectric detector | |
| CN103733025A (en) | Multi PSD-arrangement and circuitry | |
| CN106197292A (en) | A kind of building displacement monitoring method | |
| CN109297685A (en) | A kind of spectral transmittance test device and method for heavy caliber parallel light tube | |
| CN104344890A (en) | Weak light signal spectrum fast test device and method | |
| US11598851B2 (en) | Optical detecting assembly, detector and laser ranging system | |
| CN208239052U (en) | A kind of spuious optical measurement instrument of laser | |
| CN204788256U (en) | Remote benchmark laser displacement sensor | |
| CN108051005A (en) | The single PSD detection methods of Target space position and posture | |
| CN104880155A (en) | Long-distance reference laser displacement sensor and distance measurement method thereof | |
| CN102253013A (en) | Transmission method visibility detection device and method applied in field of transportation | |
| CN109764893B (en) | Method for testing stray light suppression angle of star sensor | |
| CN111953912A (en) | Method and device for detecting spatial position of high-speed moving light spot | |
| CN111006761A (en) | Simple optical calibration method for dual-channel spectrum system | |
| CN110174597A (en) | A kind of shelf depreciation positioning system and localization method based on fluorescence optical fiber | |
| CN106525239B (en) | Raster pattern imaging spectrometer spatial spectral radiance responsiveness robot scaling equipment and method | |
| US6714291B2 (en) | Process for identifying a specific light signal used in a linear optical sensor of goniometer from among other potentially disturbing light signals | |
| CN103913217B (en) | Based on the main shaft of hoister method for detecting vibration of PSD laser triangulation | |
| Bossart et al. | Proton beam profile measurements with synchrotron light | |
| CN103512657B (en) | The pick-up unit of bore hole 3D LED screen display effect and detection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 306, building 6, No. 2888, Wuzhong Avenue, Yuexi street, Wuzhong Economic Development Zone, Suzhou City, Jiangsu Province Patentee after: SUZHOU BUILDING CONSTRUCTION QUALITY INSPECTION AND TEST CENTER Address before: 215000 No. 1979 Binhe Road, Jiangsu, Suzhou Patentee before: SUZHOU BUILDING CONSTRUCTION QUALITY INSPECTION AND TEST CENTER |
|
| CP02 | Change in the address of a patent holder |